How did the Amazon
get to be one of the most biodiverse places in the world?
It's agreed that geological changes were at the heart of it.
But experts differ as to how it happened.
- Wade, L. (2015), Cradle of life.
Pueblo peoples of the US Southwest left established power
centers (like Chaco Canyon, NM) and moved north to the Mesa Verde
region in the early 1200s. Within 100 years Mesa Verde
was deserted. Many hypothesis have been offered over the
years, but a growing body of work suggests a combination of political
disruption, cultural conflict, resource shortage, violence, and
drought. These are forces very much at work in today's
Middle East and Africa, with a similar effect.
- Monastersky, R. (2015), The greatest vanishing act in prehistoric America.
527, 2629. doi:10.1038/527026a
Health in a Changing World. The 21 August 2015 Science
is a special issue investigating the current state of forest
health and its future in a changing world.
Reconstructing tectonic plate movements is a time-consuming
process. For decades we've been limited to cel animation
and raster tools (Scotese). GPlates is an open source program that makes
use of georeferenced data and can include not only tectonic plate
polygons but other vector and raster data. While it's still
time consuming to create the data, much of the work has already
been done by others.
S. E., Müller, R. D., Landgrebe, T. C. W., Whittaker, J.
M. (2012), An open-source software environment for visualizing
and refining plate tectonic reconstructions using high-resolution
geological and geophysical data sets. GSA
4-9. DOI: 10.1130/GSATG139A.1